[Arachidonic acid metabolism and angiotensin converting enzyme activity by cultured porcine pulmonary artery endothelial cells are affected with paraquat]. 1991

N Tamaru, and K Watanabe, and H Takihara, and M Yoshida
Second Department of Internal Medicine, School of Medicine, Fukuoka University, Japan.

Paraquat is a herbicide known to cause pulmonary edema in its acute toxic phase. Many investigators showed that paraquat induces morphological changes of alveolar epithelial cells even in its early phase. Controversy still exists, however, as to whether pulmonary vascular endothelial cells are also morphologically vulnerable to paraquat. To test the direct toxicity and metabolic changes of pulmonary vascular endothelial cells after paraquat addition, porcine pulmonary artery endothelial cells (PPAEC) were cultured. Thrombin- or bradykinin-stimulated PGI2 production was enhanced significantly, and the angiotensin converting enzyme (ACE) activity of cell lysate of PPAEC was significantly suppressed after a 24-hour incubation with 10(-4) M of paraquat. No further thrombin-induced enhancement of PGI2 production was noted after a 48-hour incubation. The alterations in arachidonic acid metabolism and ACE activity mentioned above did not result from cytotoxicity of paraquat because LDH release into culture medium was not increased during 72 hours of incubation with paraquat. Longer incubation more than 48 hours, in turn, induces obvious toxic effects on PPAEC.

UI MeSH Term Description Entries
D007703 Peptidyl-Dipeptidase A A peptidyl-dipeptidase that catalyzes the release of a C-terminal dipeptide, oligopeptide-|-Xaa-Yaa, when Xaa is not Pro, and Yaa is neither Asp nor Glu. Thus, conversion of ANGIOTENSIN I to ANGIOTENSIN II, with increase in vasoconstrictor activity, but no action on angiotensin II. It is also able to inactivate BRADYKININ, a potent vasodilator; and has a glycosidase activity which releases GPI-anchored proteins from the membrane by cleaving the mannose linkage in the GPI moiety. (From https://www.uniprot.org April 15, 2020). ACE1 Angiotensin-Converting Enzyme 1,ACE1 Protein,Angiotensin Converting Enzyme,Angiotensin Converting Enzyme 1,Antigens, CD143,CD143 Antigens,Dipeptidyl Carboxypeptidase I,Kininase II,Peptidase P,Angiotensin I-Converting Enzyme,Carboxycathepsin,Dipeptidyl Peptidase A,Kininase A,ACE1 Angiotensin Converting Enzyme 1,Angiotensin I Converting Enzyme,Carboxypeptidase I, Dipeptidyl,Peptidyl Dipeptidase A
D010269 Paraquat A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds. Methyl Viologen,Gramoxone,Paragreen A,Viologen, Methyl
D011464 Epoprostenol A prostaglandin that is a powerful vasodilator and inhibits platelet aggregation. It is biosynthesized enzymatically from PROSTAGLANDIN ENDOPEROXIDES in human vascular tissue. The sodium salt has been also used to treat primary pulmonary hypertension (HYPERTENSION, PULMONARY). Prostacyclin,Prostaglandin I2,Epoprostanol,Epoprostenol Sodium,Epoprostenol Sodium Salt, (5Z,9alpha,11alpha,13E,15S)-Isomer,Flolan,Prostaglandin I(2),Veletri
D011651 Pulmonary Artery The short wide vessel arising from the conus arteriosus of the right ventricle and conveying unaerated blood to the lungs. Arteries, Pulmonary,Artery, Pulmonary,Pulmonary Arteries
D002478 Cells, Cultured Cells propagated in vitro in special media conducive to their growth. Cultured cells are used to study developmental, morphologic, metabolic, physiologic, and genetic processes, among others. Cultured Cells,Cell, Cultured,Cultured Cell
D004730 Endothelium, Vascular Single pavement layer of cells which line the luminal surface of the entire vascular system and regulate the transport of macromolecules and blood components. Capillary Endothelium,Vascular Endothelium,Capillary Endotheliums,Endothelium, Capillary,Endotheliums, Capillary,Endotheliums, Vascular,Vascular Endotheliums
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D013552 Swine Any of various animals that constitute the family Suidae and comprise stout-bodied, short-legged omnivorous mammals with thick skin, usually covered with coarse bristles, a rather long mobile snout, and small tail. Included are the genera Babyrousa, Phacochoerus (wart hogs), and Sus, the latter containing the domestic pig (see SUS SCROFA). Phacochoerus,Pigs,Suidae,Warthogs,Wart Hogs,Hog, Wart,Hogs, Wart,Wart Hog
D016718 Arachidonic Acid An unsaturated, essential fatty acid. It is found in animal and human fat as well as in the liver, brain, and glandular organs, and is a constituent of animal phosphatides. It is formed by the synthesis from dietary linoleic acid and is a precursor in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes. (all-Z)-5,8,11,14-Eicosatetraenoic acid,Arachidonic Acid, (all-Z)-Isomer, 1-(14)C-Labeled,Arachidonic Acid, (all-Z)-isomer, 3H-Labeled,Arachidonic Acid, Ammonium Salt, (all-Z)-Isomer,Arachidonic Acid, Cerium Salt, (all-Z)-Isomer,Arachidonic Acid, Cesium Salt, (all-Z)-Isomer,Arachidonic Acid, Lithium Salt, (all-Z)-Isomer,Arachidonic Acid, Potassium Salt, (all-Z)-Isomer,Arachidonic Acid, Sodium Salt,Arachidonic Acid, Sodium Salt, (all-Z)-Isomer,Arachidonic Acid, Zinc Salt, (all-Z)-Isomer,Sodium Arachidonate,Vitamin F,Arachidonate, Sodium

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